Labels:text | screenshot | font | number OCR: FREQUENCY ...................... . .. .. . . . . . . . . . . . . . . FREQUENCY IS THE number of times a regular event occurs within a given period. It is measured in hertz (Hz). One hertz (1 Hz) is equal to one complete cycle per second. Human beings can hear air vibrations in a range from 20 Hz-15,000 Hz.
